Douglas W KARKOW
Inventor
Stats
- 10 US patents issued
- 75 US Applications filed
- most recent filing
This is official USPTO record data
Details
- 10 US Patents Issued
- 75 US Applications Filed
- 149 Total Citation Count
- Oct 3, 2024 Most Recent Filing
- Oct 23, 2013 Earliest Filing
Work History
| Patent Owner | Applications Filed | Year |
|---|---|---|
| CLEARSIGN COMBUSTION CORPORATION | 2
12 16 20 5 | 2013
2014 2015 2016 2017 |
Inventor Addresses
| Address | Duration |
|---|---|
| DES MOINES, WA, US | Oct 01, 15 - Jan 24, 19 |
| Des Moines, WA, US | Jun 28, 16 - Jun 29, 21 |
| KENT, WA, US | Jun 09, 16 - Jun 09, 16 |
| Kent, WA, US | Mar 19, 15 - Mar 19, 15 |
| MANCHESTER, IA, US | Feb 14, 19 - May 09, 19 |
| MOUNT VERNON, IA, US | Sep 12, 19 - Mar 20, 25 |
| Manchester, IA, US | Jul 23, 19 - Sep 06, 22 |
| Mount Vernon, IA, US | Dec 24, 19 - Aug 20, 24 |
Technology Profile
| Technology | Matters | |
|---|---|---|
| B01J: | CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS | 4 |
| C01B: | NON-METALLIC ELEMENTS; COMPOUNDS THEREOF | 2 |
| C01G: | COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F | 1 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 2025/0093,024 | 2025 | BURNER SYSTEM INCLUDING A DISTAL FLAME HOLDER AND A NON-REACTIVE FLUID SOURCE | 0 |
| 12066248 | 2024 | Burner system including a plurality of perforated flame holders | 0 |
| 2023/0115,032 | 2023 | ULTRA LOW EMISSIONS FIRETUBE BOILER BURNER | 0 |
| 2023/0072,921 | 2023 | BURNER SYSTEM WITH DISCRETE TRANSVERSE FLAME STABILIZERS | 0 |
| 11460188 | 2022 | Ultra low emissions firetube boiler burner | 0 |
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